CVE-2017-14954

LOW

Description

The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 accesses rusage data structures in unintended cases, which allows local users to obtain sensitive information, and bypass the KASLR protection mechanism, via a crafted system call.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6c85501f2fabcfc4fc6ed976543d252c4eaf4be9

https://github.com/torvalds/linux/commit/6c85501f2fabcfc4fc6ed976543d252c4eaf4be9

https://grsecurity.net/~spender/exploits/wait_for_kaslr_to_be_effective.c

https://twitter.com/_argp/status/914021130712870912

https://twitter.com/grsecurity/status/914079864478666753

Details

Source: MITRE

Published: 2017-10-02

Updated: 2017-10-06

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 2.1

Vector: (AV:L/AC:L/Au:N/C:P/I:N/A:N)

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3.0

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM